US4130537AExpiredUtility

Asbestos free friction element

79
Assignee: PORTER CO INC H KPriority: Feb 2, 1977Filed: Feb 2, 1977Granted: Dec 19, 1978
Est. expiryFeb 2, 1997(expired)· nominal 20-yr term from priority
Inventors:George J. Bohrer
F16D 69/026Y10T442/2344Y10T428/2964
79
PatentIndex Score
34
Cited by
6
References
37
Claims

Abstract

A composition for use in forming an asbestos free friction element includes a cross-linkable polymeric binder and glass fibers with a sufficient amount of an infusible organic fiber to mitigate the aggressive behavior of the friction element during operation.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. In a composition for use in forming an asbestos free friction element which exhibits aggressive behavior during operation, said composition including a cross-linkable polymeric binder and glass fibers, the improvement comprising: infusible organic fibers in said composition to mitigate said aggressive behavior, said infusible organic fibers being present in the range of 10 to 185 percent by weight based on the weight of the glass fibers.   
     
     
       2. The improvement of claim 1 wherein: said infusible organic fibers are present in the range of 33 to 67 percent by weight based on the weight of the glass fibers.   
     
     
       3. The improvement of claim 1 wherein: said infusible organic fibers are selected from the group consisting of cotton, jute, hemp, sisal, rayon, wool and aramid fibers.   
     
     
       4. The improvement of claim 3 wherein: said infusible organic fibers are cotton.   
     
     
       5. In a composition for use in forming a friction element, said composition including a cross-linkable polymeric binder and reinforcing constitutents, the improvement wherein said composition is asbestos-free and said reinforcing constituents comprise: infusible organic fibers and RFL-coated glass fibers in contact with said cross-linkable polymeric binder, the ratio by weight of said infusible organic fibers to said glass fibers being in the range of 10:90 to 65:35.   
     
     
       6. The improvement of claim 5 wherein: the ratio by weight of said infusible organic fibers to glass fibers is in the range of 25:75 to 40:60.   
     
     
       7. The improvement of claim 5 wherein said infusible organic fibers are selected from the group consisting of cotton, jute, hemp, sisal, rayon, wool and aramid fibers. 
     
     
       8. The improvement of claim 7 wherein: said infusible organic fibers are cotton.   
     
     
       9. The improvement of claim 5 wherein: said RFL is present in the range of 5 to 50 percent by weight based on the weight of the glass fibers.   
     
     
       10. The improvement of claim 9 wherein: said RFL is present in the range of 15 to 35 percent by weight based on the weight of the glass fibers.   
     
     
       11. In an intermediate, shaped article for use in forming an asbestos-free friction element which exhibits aggressive behavior during operation, said article including a cross-linkable polymeric binder and glass fibers, the improvement comprising: infusible organic fibers in said article to mitigate said aggressive behavior, said infusible organic fibers being present in the range of 10 to 185 percent by weight of the glass fibers.   
     
     
       12. The improvement of claim 11 wherein: said infusible organic fibers are present in the range of 33 to 67 percent by weight based on the weight of the glass fibers.   
     
     
       13. The improvement of claim 11 wherein: said infusible organic fibers are selected from the group consisting of cotton, jute, hemp, sisal, rayon, wool and aramid fibers.   
     
     
       14. The improvement of claim 13 wherein: said infusible organic fibers are cotton.   
     
     
       15. In an intermediate shaped article for use in forming a friction element, said article including reinforcing constitutents impregnated with a cross-linkable polymeric binder, the improvement wherein said article is asbestos-free and said reinforcing constituents comprise: infusible organic fibers and elastomer coated glass fibers present in a weight ratio in the range of 10:90 to 65:35.   
     
     
       16. The improvement of claim 15 wherein: the ratio by weight of said infusible organic fibers to glass fibers is in the range of 25:75 to 40:60.   
     
     
       17. The improvement of claim 15 wherein: said infusible organic fibers are selected from the group consisting of cotton, jute, hemp, sisal, rayon, wool and aramid fibers.   
     
     
       18. The improvement of claim 17 wherein: said infusible organic fibers are cotton.   
     
     
       19. The improvement of claim 15 wherein: said elastomer is RFL which is present in the range of 5 to 50 percent by weight based on the weight of the glass.   
     
     
       20. The improvement of claim 19 wherein: said RFL is present in the range of 15 to 35 percent by weight based on the weight of the glass.   
     
     
       21. The improvement of claim 15 wherein: said infusible organic fibers and glass fibers are in the form of yarn.   
     
     
       22. The improvement of claim 21 wherein: at least one strand of said infusible organic yarn and at least one strand of said glass yarn are in a substantially side-by-side relationship in the form of tape.   
     
     
       23. The improvement of claim 20 wherein: said infusible organic yarn and said glass yarn are woven together to form a fabric.   
     
     
       24. In an asbestos free friction element which exhibits aggressive behavior during operation, having a cross-linked polymeric matrix and having dispersed therethrough glass fibers, the improvement comprising: infusible organic fibers dispersed throughout said element to mitigate said aggressive behavior, said infusible organic fibers being present in the range of 10 to 185 percent by weight based on the weight of said glass fibers.   
     
     
       25. In a friction element having a matrix including a cross-linked polymeric binder and having dispersed therethrough reinforcing constituents, the improvement wherein: said element is asbestos-free and said reinforcing constituents comprise:   infusible organic fibers and RFL-coated glass fibers present in a weight ratio in the range of 10:90 to 65:35.   
     
     
       26. The improvement of claim 25 wherein: said RFL is in bonding relationship with said fibrous glass and said matrix.   
     
     
       27. In an asbestos-free friction element including a cross-linked polymeric binder and glass fibers the improvement comprising: said element containing infusible organic fibers to reduce aggressiveness during the operation of said element, said infusible organic fibers being present in said element in the range of 10 to 185 percent by weight based on the weight of said glass fibers in said element.   
     
     
       28. In a friction element having a matrix including a cross-linked polymeric binder and having dispersed therethrough fibrous reinforcing constituents, the improvement wherein: said element is asbestos free and said reinforcing constituents comprise 25 to 40 parts by weight cotton fibers; and 60 to 75 parts by weight glass fibers which are RFL-coated.   
     
     
       29. The friction element of claim 28 wherein: said reinforcing constituents comprise 30 to 65 percent by weight of the friction element.   
     
     
       30. In a composition for use in forming an asbestos-free friction element which exhibits aggressive behavior during operation, said composition including a cross-linkable polymeric binder and glass fibers, the improvement comprising: infusible organic fibers present in said composition in the range of 2 to 50 percent by weight based on the total weight of said improved composition.   
     
     
       31. The improvement of claim 30 wherein: said range is 7.5 to 25 percent.   
     
     
       32. In a composition for use in forming a friction element, said composition including a cross-linkable polymeric binder and reinforcing constituents, the improvement wherein said composition is asbestos-free and said reinforcing constituents comprise: infusible organic fibers and glass fibers which taken together are present in the range of 20 to 75 percent by weight based on the total weight of said improved composition.   
     
     
       33. The improvement of claim 32 wherein: said range is 30 to 65 percent.   
     
     
       34. In an intermediate, shaped article for use in forming an asbestos-free friction element which exhibits aggressive behavior during operation, said article including a cross-linkable polymeric binder and glass fibers, the improvement comprising: infusible organic fibers in said article to mitigate said aggressive behavior, said infusible organic fibers being present in the range of 2 to 50 percent by weight based on the total weight of said improved article.   
     
     
       35. The improvement of claim 34 wherein: said range is 7.5 to 25 percent.   
     
     
       36. In an intermediate shaped article for use in forming a friction element, said article including reinforcing constituents impregnated with a cross-linkable polymeric binder, the improvement wherein said article is asbestos-free and said reinforcing constituents comprise: infusible organic fibers and elastomer coated glass fibers which taken together and present in the range of 20 to 75 percent by weight based on the total weight of said improved article.   
     
     
       37. The improvement of claim 36 wherein: said range is 30 to 65 percent.

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